I've been using Fedora on the same notebook (HP8710w) since the release of Fedora 9 without any issues. However, now my WLAN frequently disconnects with the message:

kernel: iwlagn: Microcode SW error detected. Restarting 0x2000000. I'm using the 2.6.29.5-191.fc11x86_64 kernel. I experienced no problems under Fedora 9 or 10 with the WLAN - it was very reliable. My WLAN adapter is the Intel 4965AGN, which I use in conjunction with an Edimax router.

Any suggestions for what might be the problem here? Sometimes I can get three or four disconnects in one hour, other times it might be fine for an entire afternoon. There does not appear to be a "trigger" mechanism. Thanks in advance for any help or suggestions.

+1
I have been suffering from the same thing since Fedora 11 upgrade.
I found that rmmod iwlagn && modprobe iwlagn cures it.
However, this also has a "feature" of completely crashing the machine every forth time.
It only happens at full blast - that is, if I copy something > 50 MB from another PC on the LAN..

I, too, am getting this... Can anyone verify if it has something to do with associating an AP by clicking on 'Edit Connections' and manually adding a wireless network and all info or does the problem happen when clicking on avail AP and then inputting connection info or it doesn't matter, either way causes same result...

I am seeing exactly the same issue but couldn't figure out the problem from googling. I am running F11 on HP6910p for over a month and was stable. All of a sudden, my wlan started acting up and I have no clue what caused it. I sorta hate these long list of updates every other day but I believe they are somewhat important but they tend to mess up your otherwise fine working OS.

Anyway, coming from Red Hat Enterprise world, I don't think I'll stick to this flaky OS for a long time. I must admit, it works perfectly for everything else but the wireless part. Here is the error message is see:

I have tried almost everything I found on Internet to fix this but nothing worked. One guy has a suggestion to decrease the power of Wifi since he thinks it might be related to over heating of Wireless NIC and that worked for him but not me. The other recommended using rawhide kernel but others trying to do the same screwed their OS, so I won't follow those instructions. My laptop is little more than a fun laptop and it is critical for me to stay up and running with no connectivity issues.

Hope Fedora will come up with a solution sooner than later. If anyone else has a solution, please post here.

Try and see if these help. Note that these are contradictory: power on allows the system to change the card's output level,
and echo 8 > .. command actually sets the power output to its lowest setting. So, do the iwconfig thing first, if it still hangs,
turn off power management with iwconfig wlan0 power off, then try the second command (the echo).

I just downloaded a 700MB file using this, and I kept a close eye on the temperature.. It went up to 59 and then came down. Also try lifting up the laptop to give it more air..

PS: At any time you can see the power level using:
cat /sys/bus/pci/drivers/iwlagn/0000\:06\:00.0/power_level

With me, it only happens as soon as I fire up Transmission and start downloading some torrent. Is this some crazy anti-piracy tactic from Fedora

I've tried downloading other files using different protocols with the rate up to 1MB/s but my wireless remained connected. Any clue what Transmission might be doing? I'll try some other torrent app and see if I continue to experience the same.

Thanks for the other suggestions of changing the power_level and keeping an eye on temperature. my /sys/bus/pci/drivers/iwlagn/0000\:10\:00.0/temperature give the reading of 341. Any clue how to convert it to a more understandable metric?

I use docking station so my laptop is always lifted from the ground. I never use it on my lap so it